I'm just about done slamming my pool, hopefully I pass the OCLT tonight. My Ph is currently 7.3, Alkalinity 65, CYA 40. Anyways, I want to bring my CYA up to 60-70 once the slam is done. Adding approx. 650g of CYA will drop my PH 0.54. Is this a permanent drop or will the Ph slowly climb...